#!/sbin/runscript
# Copyright © 2005  TUBITAK/UEKAE
# Licensed under the GNU General Public License, version 2.
# See the file http://www.gnu.org/copyleft/gpl.txt.
#
# Original work belongs Gentoo Linux

depend() {
	need net
}

#
# Does nothing if a route exists that supports multicast traffic.
# If no routes supporting multicast traffic exists, the function
# tries to add one.  A 0 is returned on success and a 1 on failure.
# One parameter must be passed in.  This variable determins verbosity.
# If parameter is non-zero debugging will appear.
#
multicast_route_set() {
	PING_OPTIONS_1='-c1 -w1'
	PING_OPTIONS_2='-c1 -i1'
	MULTICAST_ADDRESS='239.255.255.253'
	TMP_FILE=/tmp/route.check
	PING_ERROR_NO_ROUTE='unreachable'

	MSG_FAILED_TO_FIND='Failed to Detect Multicast Route'
	MSG_SUCCESS_ON_FIND='Multicast Route Enabled'
	MSG_ADDING_ROUTE='Attempting to Add Multicast Route ...'
	MSG_FAILED_TO_ADD=' FAILED - Route NOT Added.'
	MSG_SUCCES_ON_ADD=' SUCCESS - Route Added.'

	CMD_GET_INTERFACE="netstat -i | awk 'BEGIN{}(NR>2)&&(!/^lo*/){print \$1}'"
	CMD_ADD_ROUTE="route add -net 224.0.0.0 netmask 240.0.0.0"

	ping $PING_OPTIONS_1 $MULTICAST_ADDRESS 2> $TMP_FILE 1> /dev/null
	if [ $? = 2 ]; then
		ping $PING_OPTIONS_2 $MULTICAST_ADDRESS 2> $TMP_FILE 1> /dev/null
	fi

	grep $PING_ERROR_NO_ROUTE $TMP_FILE > /dev/null 2>&1
	err_unreachable_found=$?

	#If errors, add route. Otherwise, do nothing
	if [ -s $TMP_FILE ] && [ $err_unreachable_found = 0 ]; then 

		if [ $1 != 0 ]; then
			echo $MSG_FAILED_TO_FIND 
			echo $MSG_ADDING_ROUTE 
		fi

		$CMD_ADD_ROUTE `eval $CMD_GET_INTERFACE` > /dev/null 2>&1
		retval=$?
		if [ $1 != 0 ]; then

			if [ $retval = 0 ]; then
				echo $MSG_SUCCES_ON_ADD
			else
				echo $MSG_FAILED_TO_ADD
			fi
		fi
	else
		if [ $1 != 0 ]; then
			echo -n $MSG_SUCCESS_ON_FIND
		fi
		retval=0
	fi

	rm -f $TMP_FILE # Clean up
	return $retval
}

checkconfig() {
	multicast_route_set 0
	if [ $? -ne 0 ]; then
		eerror "No route available for multicast traffic!"
		return 1
	fi
}

start() {
	checkconfig || return 1
	ebegin "Starting slpd"
	start-stop-daemon --start --quiet --background --exec /usr/sbin/slpd
	eend $?
}

stop() {
	ebegin "Stopping slpd"
	start-stop-daemon --stop --quiet --pidfile /run/slpd.pid
	eend $?
}
